[jboss-jira] [JBoss JIRA] (JGRP-1674) STOP_FLUSH race condition

[Dennis Reed (JIRA)]

Dennis Reed created JGRP-1674:
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             Summary: STOP_FLUSH race condition
                 Key: JGRP-1674
                 URL: https://issues.jboss.org/browse/JGRP-1674
             Project: JGroups
          Issue Type: Bug
    Affects Versions: 2.6.21
            Reporter: Dennis Reed
            Assignee: Bela Ban


There is a race condition in STOP_FLUSH when a node joins the cluster.

JOINER sends JOIN_REQ to MASTER
MASTER does a flush on the existing members (START_FLUSH, ...)
MASTER sends JOIN_RSP
MASTER sends STOP_FLUSH

JOINER receives JOIN_RSP
JOINER fetches state, sends START_FLUSH
JOINER receives STOP_FLUSH from MASTER

onStopFlush never verifies that the current node was part of the FLUSH, and therefore is valid for the current node.
So this STOP_FLUSH corrupts JOINER's FLUSH by resetting all the member variables (and probably unblocking).


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